https://controlsfx.github.io/features/snapshotview/
SnapshotView | ControlsFX
SnapshotView # The SnapshotView control allows users to draw a bounding box inside a scenegraph (or typically in an ImageView). This bounding box represents...
https://controlsfx.github.io/javadoc/11.1.2/org.controlsfx.controls/org/controlsfx/control/SnapshotView.Boundary.html
SnapshotView.Boundary (ControlsFX Project 11.1.2)
boundaryproject